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New
Baltic Bottom
£24.99
The Baltic briefs are our most flattering swim bottoms yet. Designed with a high waist and supportive waistband, they give you the confidence to focus on the water – not on what you're wearing. They're part of our mix-and-match swim system, so you can find a combination that works for your body, not someone else’s.
Pair them with the Baltic or Nefyn top. Or swap in the Nefyn briefs if you prefer a lower rise. Your swimwear, your way.
Why you'll reach for the Baltic briefs
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Core coverage - Deep waistband and high waist to support and flatter
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Freedom to move - High leg cut offers comfort and flexibility in the water
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No sag, no fuss - Shape-holding stretch fabric that stays put in the water
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Ready for the elements - Fully lined and resistant to sun cream, salt and chlorine
Find freedom in the water
The Baltic briefs are designed for wild swimming in wild places – mountain tarns, river bends, and rocky coastlines. Fully lined, with a high cut leg gives you full freedom of movement and confidence to boot, while the wide waistband supports your core without feeling tight. The fabric is soft but structured. Lightweight but strong. And it doesn’t bag out when wet.
They're swimwear made to fit you – and made to last.
Made with ECONYL®
The Baltic is made from ECONYL® regenerated nylon – a high-quality Italian performance fabric made using ocean plastic waste. It offers UPF 50+ sun protection, holds its shape wear after wear, and is designed to be kinder to the places you swim.
Features
Product overview
- High quality Italian fabric
- ECONYL ® recycled nylon made from regenerated ocean plastic
- Fully lined, core lower body coverage
- High leg cut for total freedom of movement
- Stretch fabric that retains its shape in the water
- Deep waistband for support, comfort and a flattering fit
- Chlorine, sun cream and UV resistant
- Super flattering seam placement with flatlock seams
- 3-year Alpine Bond
Technical details
Fit
Tight
Materials
78% ECONYL ® recycled nylon (made from regenerated ocean plastic waste), 22% spandex
UPF 50+
Origin
Italy
Sustainability and Product Care
Product care
Washing instructions
Wash: 30 ̊C, delicate cycle at or hand wash with lukewarm water.
Dry: Line dry only, do not tumble dry.
Iron: Use a cool iron.
DO NOT use detergent, fabric conditioners or softeners. Rinse thoroughly in clean water.
Remember to rinse your swimwear thoroughly between swims in differnt bodies of water to avoid cross-contamination.
Repairs
We have dedicated Repair Stations in our stores and we're fully equipped to breathe new life into your old kit. This includes spare parts, patches, new zips and wash and reproofing of your down and waterproofs. Pop into any store or contact us online for more info.
Alpine Bond
If one of our products doesn't meet your expectations upon delivery, or if during its lifetime it doesn't live up to the demands placed on it, please return it to us for repair, replacement or refund. Find out more about our Alpine Bond.
Sustainability
Recycled materials
Econyl fabric is made with 78% recycled nylon from regenerated ocean plastic waste. Using recycled content helps close the circle and prolong the useful life of the original raw materials..
Where it's made
Our products are made in the best factories in the world. We know the factories personally and they have all signed up to our Code of Ethics in our supply chain. This includes the Ethical Trading Initiative base code, fair pay, safe working environments, no child labour, no modern slavery, no bribery or corruption, no materials from conflict zones and humane farming methods.
All our factories sign up to our Code of Conduct. Find out where we make our product by visiting our Factories of Alpkit factory zone.
Reducing our carbon footprint
We are carbon neutral under PAS2060 and offset our Scope 1, Scope 2 and Scope 3 operations and transport emissions. We recognise that offsetting is not part of the solution but a point to pass through on a journey to Net Zero. Carbon Neutral is just a step in that journey.
We have joined the Science Based Targets Initiative which sets independent targets for us to achieve to do our bit to limit global warming to 1.5°C. Our targets are to halve our Scope 1 and Scope 2 emissions by 2025 based on 2018 base year and reduce our total carbon intensity by 15% every year to achieve genuine net zero by 2050.
End of life
When your partnership with this product is over send it back to us and we will pass it on to someone that needs it through our Continuum Project.
Standard delivery to UK addresses is free over £50.
Next Day deliveries will be shipped same day if you place your order before 2pm Monday - Friday.
If you are not happy or have changed your mind, you can return your unused product within 123 days of placing the order for a refund.
Simply return it to us, free of charge, with all the original packaging.
Women's Swimwear Sizing | ||||||
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UK | 8 | 10 | 12 | 14 | 16 | 18 |
Chest Inches CMs |
32" 81 |
34" 86 |
36" 91 |
38" 97 |
40" 102 |
42" 107 |
Waist Inches CMs |
25.5" 65 |
27" 69 |
29" 74 |
31" 79 |
33" 84 |
35" 89 |
Hips Inches CMs |
35" 89 |
37" 94 |
39" 99 |
41" 104 |
43" 109 |
45" 114 |
EU USA |
36 4 |
38 6 |
40 8 |
42 10 |
44 12 |
46 14 |
How to Measure
This size chart indicates the body measurements our garments are designed to fit. Measure yourself as described below, and use the size chart to find your size:Chest - Measure around your chest at the widest part. The tape measure should pass under your arms, and be level from front to back.
Waist - Measure around your waist at the narrowest part.
Hips - Standing with your feet together, measure around your hips at the widest part.
Fit Guide

Tight
Close fitting designed to conform to your body shape.

Slim
Slim and slightly contoured but not form fitting.

Regular
A comfortable fit that's not too tight, nor too loose.

Relaxed
A looser fit with a bit more space but not too baggy.