O'Neill HyperFreak 5/4+ Chest-Zip Hooded Fullsuit — maximum warmth, minimum restriction for cold-water charging. The HyperFreak 5/4+ takes O'Neill's flagship wetsuit platform and dials it up for serious cold: 5mm torso insulation and 4mm limbs keep you in the water when temperatures drop to 45–55°F.

• UltraFlex 3 Neoprene — O'Neill's most stretchy limestone neoprene, delivering elite paddle mobility even at 5/4+ thickness
• TechnoButter 3x Interior — ultra-soft, quick-drying lining that retains warmth throughout the session and resists clamminess on re-entry
• FluidSeam Welded Seams — fully sealed, internally taped construction with no stitch-through — water stays out, heat stays in
• Chest Zip Entry — recessed low-profile zipper eliminates the cold-water flush that plagues back-zip suits; locks shut under pressure
• Integrated Neoprene Hood — snug anatomical hood seals heat at the neck and eliminates ice-cream headaches in frigid conditions
• Smooth Skin Chest Panel — wind-blocking exterior keeps core warmth intact between sets

For surfers regularly paddling out in 45–57°F water, the 5/4+ is the step up from a 4/3 that makes the difference between a comfortable session and cutting it short. Paired with gloves and booties, it handles the coldest mornings your local break can throw at you.

Available in men's sizes S–2XL. If between sizes, size up for comfort. Machine wash cold, hang dry. Do not tumble dry or leave in direct sunlight.