Product Description
- U.P.F. 50+ Maximum Protection
- TechnoButter Skin – Ultra-soft 4-way stretch fabric
- Hydrophobic HyperDry Technology for fast drying
- Performance Fit – Form-fitting second-skin feel
- Rash Protection for Surfing & Watersports
- Lightweight & Quick Dry Construction
- Flatlock Stitched – Breathable seams
The O’Neill Hyperfreak Rash Under Shorts are designed to deliver premium comfort and protection under boardshorts or wetsuits. Built from O’Neill’s exclusive TechnoButter Skin fabric, they feel incredibly soft, lightweight and stretchy — offering a true second-skin fit that moves naturally with you.
These surf shorts are ideal for preventing inner-thigh rash and irritation during long sessions. The performance fit reduces bunching and drag, while the 4-way stretch construction ensures complete freedom of movement whether you’re surfing, swimming or paddleboarding.
They’re also a great option for added modesty on surf trips, training camps or busy beaches. Instead of wearing soggy cotton boxers under your boardshorts, these dry quickly and stay comfortable in and out of the water. HyperDry technology helps them shed water fast, keeping the fabric light between sessions.
With UPF 50+ protection built in, they offer valuable sun protection when worn alone or under boardshorts in tropical conditions. Minimal, streamlined and unbelievably comfortable, these are the go-to base layer for serious warm-water surfing.
Expert Advice
If you’ve ever dealt with soggy boxers or uncomfortable chafing on long surf days, these are a must. The TechnoButter Skin fabric feels far superior to standard compression shorts and doesn’t go heavy when wet.
Perfect for surf trips, training camps or just keeping things comfortable under boardshorts, they’re one of those small upgrades that make a big difference.
Q&A
Q: Can these be worn under boardshorts?
A: Yes — they’re specifically designed as a performance under-layer
for surfing.
Q: Are they better than wearing normal
underwear?
A: Yes — they dry quickly, prevent chafing and won’t stay heavy and
wet like cotton boxers.
Q: Are they tight fitting?
A: Yes — they have a performance, second-skin fit to prevent
movement and irritation.
Q: Do they dry quickly?
A: Yes — HyperDry technology ensures fast drying between
sessions.
Why Buy From Shore.co.uk
- We’ve been selling wetsuits and surf hardware for over 30 years
- We use the gear we sell – call our friendly staff for advice on 01243 674830
- Europe’s largest dedicated wetsuit showroom
- No hassle returns policy – if it’s not right just send it back for a full refund or exchange
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Brand info
O'Neill Clothing & Wetsuits
O'Neill Wetsuits and Fashion have been stocked at Shore since the beginning. Right back when the store first opened, Simon the founder was the fist shop in the UK with the suits in store when they first landed from America. As the Brand has grown so has our offering and we are super happy that we have the largest dedicated O'Neill wetsuit showroom in the world plus a huge range of fashion all in store right now.
Size Guide
| Product size | Height | Weight | Chest | Waist |
|---|---|---|---|---|
| 2XS | 168 - 173 cm 5'6" - 5"8 ft |
52 - 59 kg 115 - 130 lbs |
90 - 93 cm 35.5" - 36.5" in |
70 - 72 cm 27.5" - 28" in |
| XS | 170 - 175 cm 5'7" - 5'9"ft |
57 - 64 kg 125 - 140 lbs |
93 - 95 cm 36.5" - 37.5" in |
72 - 75 cm 28" - 29.5" in |
| SS | 166 - 171 cm 5'5" - 5'7" ft |
59 - 68 kg 130 - 150 lbs |
95 - 99 cm 37.5" - 39" in |
75 - 79 cm 29.5" - 31" in |
| S | 173 - 178 cm 5'8" - 5'10" ft |
61 - 70 kg 135 - 155 lbs |
95 - 99 cm 37.5" - 39" in |
75 - 79 cm 29.5" - 31" in |
| ST | 183 - 188 cm 6'0" - 6'2" ft |
66 - 75 kg 146 - 165 lbs |
95 - 99 cm 37.5" - 39" in |
75 - 79 cm 29.5" - 31" in |
| MS | 169 - 174 cm 5'6.5" - 5'8.5" ft |
66 - 75 kg 145 - 165 lbs |
99 - 104 cm 39" - 41" in |
79 - 84 cm 31" - 33" in |
| M | 175 - 180 cm 5'9" - 5'11" ft |
70 - 77 kg 154 - 170 lbs |
99 - 104 cm 39" - 41" in |
79 - 84 cm 31" - 33" in |
| MT | 185 - 191 cm 6'1" - 6'3" ft |
73 - 82 kg 160 - 180 lbs |
99 - 104 cm 39" - 41" in |
79 - 84 cm 31" - 33" in |
| LS | 171 - 177 cm 5'7.5" - 5'9.5" ft |
73 - 82 kg 160 - 180 lbs |
104 - 110 cm 41" - 43" in |
84 - 89 cm 33" - 35" in |
| L | 178 - 183 cm 5'10" - 6'0" ft |
77 - 86 kg 170 - 190 lbs |
104 - 110 cm 41" - 43" in |
84 - 89 cm 33" - 35" in |
| LT | 188 - 193 cm 6'2" - 6'4" ft |
82 - 91 kg 181 - 201 lbs |
104 - 110 cm 41" - 43" in |
84 - 89 cm 33" - 35" in |
| XLS | 174 - 179 cm 5'8.5" - 5'10.5" ft |
82 - 91 kg 181 - 201 lbs |
110 - 117 cm 43" - 46" in |
89 - 94 cm 35" - 37" in |
| XL | 180 - 185 cm 5'11" - 6'1" ft |
86 - 95 kg 190 - 209 lbs |
110 - 117 cm 43.5" - 46" in |
89 - 94 cm 35" - 37" in |
| XLT | 191 - 196 cm 6'3" - 6'5" ft |
91 - 100 kg 201 - 220 lbs |
110 - 117 cm 43.5" - 46" in |
89 - 94 cm 35" - 37" in |
| 2XL | 183 - 188 cm 6'0" - 6'2" ft |
95 - 104 kg 210 - 230 lbs |
117 - 123 cm 46" - 48.5" in |
94 - 99 cm 37" - 39" in |
| 3XL | 183 - 191 cm 6'0" - 6'3" ft |
104 - 113 kg 230 - 250 lbs |
123 - 130 cm 48.5" - 51" in |
99 - 112 cm 39" - 44" in |
| 4XL | 185 - 193 cm 6'1" - 6'4" ft |
113 - 122 kg 250 - 269 lbs |
130 - 136 cm 51" - 53.5" in |
112 - 122 cm 44" - 48" in |
Check out the above video for all the information you need regarding on what size wetsuit to order plus how to make sure when the suit arrives you test the fit properly
Delivery and Returns
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In Store Stock
| Size | Quantity in store |
|---|---|
| XL | Item available for click and collect |
Click and Collect from our Store
Why not come visit us in store? Over 65% of our range is in store now with the majority of the rest of our stock available to be collected with 24 hours.(Monday to Friday)
How it works
At checkout enter the delivery address: PO20 8DZ
Items ready to be collected in store 24 hours later (Monday to Friday)