The Patagonia Men’s Regulator® 4/3 Full Wetsuit is designed to provide an excellent balance of warmth, flexibility and freedom of movement during cold-water sessions. Its construction uses 4mm material through the body and 3mm on the arms and is recommended for water temperatures between 10°C and 15°C / 50–60°F.

The neoprene-free construction uses a flexible blend of 85% Yulex® natural rubber and 15% chlorine-free synthetic rubber by polymer content. The natural rubber comes from sources that are Forest Stewardship Council® certified by Preferred by Nature™.

The interior features NetPlus® postconsumer recycled nylon made from recycled fishing nets. The arms and lower body are lined with high-stretch NetPlus® 100% recycled nylon jersey, while the chest and back feature a thermal grid lining made from 94% recycled nylon and 6% spandex. The exterior uses NetPlus® 87% recycled nylon and 13% spandex.

The distinctive U-Zip entry, originally created by AXXE Wetsuits and refined by Patagonia, makes the wetsuit easier to put on while helping reduce flushing. The flexible YKK® #5 stretch-coil zipper provides comfort and freedom of movement and features an extended custom pull for easier opening and closing.

All seams are triple-glued and blindstitched with flexible internal seam tape. The linings are laminated with water-based, solvent-free AquaA® glue. External rubber gaskets at the wrists and ankles provide a secure fit and help reduce sudden water entry, while an easy-access key loop adds a practical finishing touch.

SPECS: 4/3mm thickness; 4mm body, 3mm arms; hoodless design; men’s formfitting fit; neoprene-free; 85% Yulex® natural rubber / 15% synthetic rubber; NetPlus® 100% recycled nylon jersey lining on arms and lower body; 94% recycled nylon / 6% spandex thermal grid on chest and back; NetPlus® 87% recycled nylon / 13% spandex exterior; U-Zip entry; YKK® #5 stretch-coil zipper; water-based, solvent-free AquaA® glue; triple-glued and blindstitched seams; flexible internal seam tape; wrist and ankle rubber gaskets; key loop; recommended water temperature 10–15°C / 50–60°F; weight 1,593 g / 56.2 oz; Black; Style No. 88577; made in Thailand in a Fair Trade Certified™ factory.

CARE: hand wash; do not bleach; drip dry; do not iron; do not dry clean.