UPF 50 Protected

Zip-Off Convertible

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Columbia

Unisex Acker Rock Convertible Trousers

Name: Unisex Acker Rock Convertible Trousers
Brand: Columbia
SKU: 2157081002
Price: 109.99 EUR
Availability: OutOfStock

€109.99

Size: Size chart

Columbia Sportswear — Sizing & Fit Charts

Columbia Size Guide

Find your perfect Columbia fit — Men's, Women's and Kids' measurements for clothing and footwear, with EU, UK and US conversion.

This is the Columbia size guide we use to fit Columbia clothing and footwear at Great Outdoors. The charts below convert between EU, UK and US sizes for Men's, Women's and Kids', with body measurements in centimetres for clothing and foot length in centimetres for footwear. Use the tabs to switch between clothing and footwear, then the buttons below to change gender.

Men's Clothing Sizing

All measurements are body measurements in centimetres (cm).

Tip: Between two sizes? Choose the larger one for outerwear and the smaller for base layers.

Tops, Jackets & Fleeces — Regular Fit Sizing

Measurement	XS	S	M	L	XL	XXL
Chest (cm)	88–89	91–94	99–104	108–112	118–122	128–132
Waist (cm)	73–74	76–79	84–89	91–97	102–107	112–117
Hips (cm)	86–87	89–91	97–102	105–109	113–119	126–130

Tops & Outerwear — Big & Tall Sizing

Measurement	1X (XL)	2X (XXL)	3X (3XL)	4X (4XL)	5X (5XL)	6X (6XL)
Chest (cm)	117–125	127–132	137–142	147–152	158–163	168–173
Waist (cm)	99–107	109–114	119–125	130–135	140–145	150–155
Hips (cm)	113–117	121–125	128–132	136–142	144–147	151–155

Trouser Sizing — Regular

Measurement	XS	S	M	L	XL	XXL
EU Size	44/46	48	50	52/54	56/58	60
UK Size	XS	S	M	L	XL	XXL
US Waist (inches)	28–30	32	34	36–38	40–42	42–44
Waist (cm)	68–74	76–81	84–89	91–96	99–107	109–117
Hips (cm)	81–86	89–94	97–102	104–109	112–117	119–124
Inseam Short	76 cm (30")
Inseam Regular	81 cm (32")
Inseam Long	86 cm (34")

Glove Sizing

Measurement	S	M	L	XL
Hand length (cm)	19–20	20–21	21–22	22–23

Performance

Body-contouring cut that moves with you. Ideal for high-activity layers.

Active

Body-skimming with mobility built in. Versatile for most activities.

Modern Classic

Universal, comfortable fit. Great for everyday outdoor use.

Relaxed

Most generous cut. Full range of movement and layering room.

Women's Clothing Sizing

All measurements are body measurements in centimetres (cm).

Tip: Unisex items follow Men's sizing — women should typically size down one size.

Tops, Jackets & Fleeces — Standard Fit Sizing

Measurement	XS	S	M	L	XL	XXL
EU Size	32	34/36	38/40	42/44	46/48	50/52
UK Size	6	8/10	12/14	16/18	20/22	24/26
US Size	6	8	10	12	14	16
Bust (cm)	85	88–90	93–95	99–103	107–111	112–117
Waist (cm)	67	71–74	76–79	83–86	90–95	97–104
Hips (cm)	90	94–97	99–102	105–109	113–118	119–127

Tops & Outerwear — Plus Size Sizing

Measurement	1X	2X	3X
US Size	16W/18W	20W/22W	24W/26W
UK Size	20/22	24/26	28/30
Bust (cm)	109–114	119–125	130–135
Waist (cm)	91–97	102–108	114–119
Hips (cm)	117–122	127–132	137–142

Trouser & Shorts Sizing — Standard

Measurement	XS	S	M	L	XL	XXL
EU Size	32	34–36	38–40	42–44	46–48	50–52
UK Size	6	8–10	12–14	16–18	20–22	24–26
US Size	2	4–6	8–10	12–14	16–18	20
Waist (cm)	67	71–74	76–79	83–86	90–95	97–104
Hips (cm)	90	94–97	99–102	105–109	113–118	119–127
Inseam Short	75 cm (29.5")
Inseam Regular	81 cm (32")
Inseam Long	88 cm (34.5")

Glove Sizing

Measurement	S	M	L	XL
Hand length (cm)	18–18.5	19–19.5	20–20.5	21–21.5

Performance

Body-contouring cut that moves with you. Ideal for high-activity layers.

Active

Body-skimming with mobility built in. Versatile for most activities.

Modern Classic

Universal, comfortable fit. Great for everyday outdoor use.

Relaxed

Most generous cut. Full range of movement and layering room.

Kids' Clothing Sizing

Sized by age and height in centimetres.

Kids' Clothing — Age & Height Sizing

Size	Age	EU Size	Height (cm)
3/6M	Under 6 months	068	62–68
6/12M	6–12 months	074	75–78
12/18M	12–18 months	080	79–84
2Y	2 years	086	84–90
3Y	3 years	092	91–98
4Y	4 years	098	98–105
XXS	4–5 years	104	99–113
XS	6–7 years	116	114–125
S	8 years	128	126–137
M	10–12 years	140	138–150
L	14–16 years	152	151–160
XL	18 years	164	161–173

Kids' Glove Sizing

Size	Age	Hand Length (cm)
XS	4–6 years	15.5–16.25
S	7–8 years	16.5–17.25
M	8–9 years	17.5–18
L	10–12 years	18.5–19
XL	14–16 years	19.25–20

🙋 Not sure about your size?

Our team is here to help you find the perfect fit. Get in touch and we'll sort it out for you.

📞 01 679 4293 ✉ info@greatoutdoors.ie

How to Measure — Clothing

1

Chest / Bust Measure at the fullest part of the chest, under the armpits and over the shoulder blades. Keep the tape firm and level.

2

Waist Measure around the natural waistline, allowing the tape to sit comfortably. Do not pull too tight.

3

Hips Measure around the fullest part of your hips and seat, keeping the tape horizontal.

4

Inseam Measure from the top of the inner leg down to the bottom of the ankle while standing upright.

5

Sleeve Start at the centre back of the neck, over the shoulder and down to the wrist. Round up to the next even number.

6

Hand Length Measure from the base of the thumb to the tip of the middle finger on a flat, open hand.

Men's Footwear Sizing

Columbia footwear uses standard EU / UK / US sizing. Foot length in cm is provided for the most accurate fit.

Tip: When in doubt between sizes, go half a size up — especially for hiking boots where you'll be wearing thicker socks.

Men's Shoe Size Conversion

EU	UK	US	Foot Length (cm)
40	6	7	24.3–24.7
40.5	6.5	7.5	24.7–25.1
41	7	8	25.1–25.6
41.5	7.5	8.5	25.6–26.0
42	8	9	26.0–26.4
42.5	8.5	9.5	26.4–26.9
43	9	10	26.9–27.3
43.5	9.5	10.5	27.3–27.7
44	10	11	27.7–28.1
44.5	10.5	11.5	28.1–28.5
45	11	12	28.5–29.0
46	12	13	29.0–29.8
47	13	14	29.8–30.7
48	14	15	30.7–31.5
49	15	16	31.5–32.4
50	16	17	32.4–33.2

Women's Footwear Sizing

Columbia footwear uses standard EU / UK / US sizing. Foot length in cm is provided for the most accurate fit.

Tip: When in doubt between sizes, go half a size up — especially for hiking boots where you'll be wearing thicker socks.

Women's Shoe Size Conversion

EU	UK	US	Foot Length (cm)
36	3	5	21.8–22.2
36.5	3.5	5.5	22.2–22.6
37	4	6	22.6–23.1
37.5	4.5	6.5	23.1–23.5
38	5	7	23.5–23.9
38.5	5.5	7.5	23.9–24.3
39	6	8	24.3–24.7
39.5	6.5	8.5	24.7–25.1
40	7	9	25.1–25.6
40.5	7.5	9.5	25.6–26.0
41	8	10	26.0–26.4
41.5	8.5	10.5	26.4–26.9
42	9	11	26.9–27.3
43	10	12	27.3–28.1

Kids' Footwear Sizing

EU, UK and US sizes with foot length guidance for growing feet.

Kids' Shoe Sizes (EU 21–30)

EU	UK	US	Foot Length (cm)
21	3K	4K	10.8–11.2
22	4K	5K	11.2–12.1
23	5K	6K	12.1–12.9
24	6K	7K	12.9–13.8
25	7K	8K	13.8–14.6
26	8K	9K	14.6–15.5
27	9K	10K	15.5–16.3
28	10K	11K	16.3–17.1
29	11K	12K	17.1–18.0
30	11.5K	12.5K	18.0–18.4

Kids' Shoe Sizes (EU 31–39)

EU	UK	US	Foot Length (cm)
31	12K	13K	18.4–18.8
32	13K	1	18.8–19.7
33	1	2	19.7–20.5
34	2	3	20.5–21.3
35	3	4	21.3–22.2
36	3.5	4.5	22.2–22.6
37	4	5	22.6–23.1
38	5	6	23.1–23.9
39	6	7	23.9–24.7

🙋 Not sure about your size?

Our team is here to help you find the perfect fit. Get in touch and we'll sort it out for you.

📞 01 679 4293 ✉ info@greatoutdoors.ie

How to Measure — Footwear

1

Foot Length Place your foot on a flat surface. Measure from the back of your heel to the tip of your longest toe.

2

Best Time to Measure Measure in the afternoon or evening — feet naturally swell throughout the day for the most accurate fit.

3

Half Sizes If you're between sizes, choose the larger half size, particularly for hiking and trail footwear.

4

Sock Thickness When measuring for hiking or winter boots, wear the type of socks you plan to use — this affects your ideal size.

Colour: Beach

Variant

Sold out

Get it Thu, Jul 2 – Fri, Jul 3

Free Delivery over €95 (IE)

31-Day Returns Policy

Benefits

omni-shield™

Two garments in one — the Columbia Acker Rock adapts from trail trousers to shorts in seconds.

Built for days out on Irish trails when the weather — and your plans — can change in an instant, the Columbia Acker Rock Convertible Trousers give you the freedom to adapt without missing a step. Featuring Columbia's Omni-Shield technology to repel moisture and resist stains, and Omni-Shade UPF 50 sun protection woven into the 100% nylon fabric, these trousers work hard in variable conditions from the hills to the coast. Zip off the legs to convert to 8-inch shorts on the fly, so you stay comfortable and in control from the first climb to the last descent.

KEY FEATURES

Omni-Shield moisture and stain repellency: Prevents liquids from soaking into the fast-drying nylon fabric, keeping you cleaner and drier in unpredictable conditions
Omni-Shade Broad Spectrum UPF 50: Blocks a wide range of harmful UVA and UVB rays across all covered areas, Skin Cancer Foundation recommended
Zip-off convertible legs: Legs unzip cleanly to transform the trousers into 8-inch shorts, giving you two garments in one for changeable days out
Elastic and drawcord-adjustable waist: Delivers a secure, personalised fit with minimal faff, ideal when you're moving fast on the trail
Relaxed oversized fit: Generous cut allows full freedom of movement for hiking, scrambling, and everything in between
Multiple secure pockets: Hand pockets plus snap-closed front and back pockets keep your essentials safe and accessible all day

Shell: 100% Nylon
Fit: Relaxed / Oversized
Gender: Unisex
Sun Protection: Omni-Shade Broad Spectrum UPF 50
Moisture Repellency: Omni-Shield advanced moisture and stain repellency
Convertible: Zip-off legs convert to 8-inch shorts
Waist: Elastic with drawcord adjustment
Pockets: Hand pockets, snap-closed front pockets, snap-closed back pocket
Certification: Skin Cancer Foundation recommended UV protectant
Care: Machine wash cold gentle, tumble dry low

Regular Fit - Neither snug nor loose - this garment can be worn solo or over other layers.

We offer free delivery on all orders over €95, and €5.95 for all orders under €95.
-We aim to ship all orders placed before 1:00pm on the same business day and have it delivered next-day, but in busy periods this can take longer, so allow for up to 3 working days for fulfillment.

We accept returns within 31 days of receiving the item, either in-store or by post.
- All items returned must be suitable to be sold again as new. For our full returns policy - click here.
- In-store returns are Free of charge, and returns posted with An Post via our returns page are €5 from a post office, or €6 collected from your home.
- All returns can be organised with An Post click & post, and will be fulfilled as soon as they arrive back at our store. Click here to start a return.

Unisex Acker Rock Convertible Trousers

Columbia Size Guide

Men's Clothing Sizing

Performance

Active

Modern Classic

Relaxed

Women's Clothing Sizing

Performance

Active

Modern Classic

Relaxed

Kids' Clothing Sizing

How to Measure — Clothing

Men's Footwear Sizing

Women's Footwear Sizing

Kids' Footwear Sizing

How to Measure — Footwear

Details

Customer Reviews

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