ION Seek Amp 4/3 Front Zip men 2025

The ION Seek Amp 4/3 Front Zip is a men's 4/3 mm full wetsuit with a front zip. The Amp range is all about maximum stretch without giving up warmth: Max_Flex outer lining on the upper body so you can paddle, hold the bar or the boom with total freedom, and Hot_Stuff 2.0 and Plasma_Plush 2.0 thermal linings inside.

Who it's for

• Kitesurf, wing, windsurf or surf riders who go out in cool water (10 to 18 °C).
• Anyone looking for maximum freedom of movement in the shoulders and arms without getting cold.
• Demanding riders who get out often and want a high-end suit.

Features

• 4/3 mm thickness: 4 mm on the torso to hold in heat and 3 mm on the arms and legs so you can move more freely.
• Water temperature: ION recommends it for cool water, from 10 to 18 °C.
• Cut: full wetsuit with front zip.
• Hot_Stuff 2.0, Plasma_Plush 2.0 and Silk_Stuff: super-stretchy Hot_Stuff 2.0 thermal lining at the front, plush, quick-drying Plasma_Plush 2.0 on the back against the wind, and thin, soft Silk_Stuff on the shoulders and arms for maximum stretch.
• Recycled Max_Flex: super-stretchy outer lining on the chest, shoulders and neck, with 30 % more flexibility, quick drying and maximum comfort.
• I_Foam: low-density foam with great thermal insulation, made with oyster shell powder.
• Glued and blind-stitched seams (Glued Blind Stitch) that extend the life of the suit.
• Flexible heat-sealed seams throughout the inside and reinforced stress points for more flexibility and durability.
• Heat-fused edges on the arms and legs for strength and comfort.
• Seamless shoulders and a low-panel design for great freedom of movement.
• Silicone prints on the front zip, arms and legs that stop water getting in.
• One-handed zip: closes to the right and opens to the left.
• Reinforced drainage holes on the chest and legs.
• Key pocket with loop.
• Replaceable cord.
• Separate leg loops.
• Composition: 80 % neoprene, 10 % polyamide and 10 % recycled polyamide.

Colour

Available in 900 black and 732 blue-nights.

Which size to choose

Official ION size chart. If you're between two sizes, pick the one that best matches your chest and weight: the suit should fit snugly, with no pockets of air or water, but still let you breathe comfortably. The tall sizes (ST, MT, LT, XLT) are for taller people and the short sizes (MS, LS, XLS, XXLS) for shorter people with a broader build. Check the selector for the sizes available in store. More details in our ION wetsuit size chart.

Frequently asked questions

What does 4/3 mean?

It's the neoprene thickness in millimetres: 4 mm on the torso, where holding in heat matters most, and 3 mm on the arms and legs, so you can move more freely.

What water temperature is it designed for?

ION rates it for cool water, from 10 to 18 °C. How warm it feels also depends on the wind, how long you stay in the water and how much you feel the cold.

What's the advantage of a front zip?

You get in through the chest and there's no zip on the back, so the suit seals better, lets in less water and the back is more flexible.