ION Feelgood 4/3 Internal Split Neoprene Socks - 2027

The ION Feelgood 4/3 Internal Split Neoprene Socks 2027 are for riders who need warmer feet in cold water without losing the feel of the board beneath them. A thin, flexible segmented sole and internal split toe favour sensitivity and control, while the double cuff and sealed seams help limit water entry.

Why choose the Feelgood 4/3 socks?

• Better connection to the board: a thin rubber sole gives more direct feedback underfoot than a thick, heavily reinforced boot.
• Natural foot movement: the segmented sole bends more freely as you adjust stance and pressure.
• Less flushing at the ankle: ION's double cuff uses a grippy silicone print to help keep the fit secure and reduce water ingress.
• Cold-water comfort: 4/3 mm neoprene, glued and blind-stitched seams and a smooth Silk_Stuff 2.0 lining support warmth without making the sock unnecessarily rigid.

Who are they for?

These are a particularly sensible option for surfing, wing foiling, windsurfing and other board sports where balance, strap contact and precise foot pressure matter. They suit riders who value warmth but dislike the disconnected feel of a bulky sole. If you regularly walk over sharp rocks or need substantial underfoot impact and abrasion protection, consider a more reinforced neoprene boot instead.

Features that matter on the water

Internal split toe and segmented sole

The internal toe separation gives the big toe a more defined position inside the sock without an exposed external split. Combined with the flexible sole sections, it helps the foot move and respond naturally when loading the rail, shifting stance or making small balance corrections.

Double cuff and drainage

The double-cuff construction and silicone grip help reduce flushing at the ankle. These are neoprene water-sports socks, not waterproof dry footwear: if water gets inside the outer cuff, integrated drain holes help it escape rather than sit trapped around the ankle.

Silk_Stuff 2.0 and sealed seams

ION uses a thin, smooth Silk_Stuff 2.0 inner lining made from 100% GRS-certified recycled nylon. It feels softer against bare skin and allows the neoprene to stretch. Glued, blind-stitched and sealed seams help reduce water penetration through the stitching and support thermal comfort.

Specifications

• Model: Feelgood Socks 4/3 Internal Split, 2027
• Thickness: 4/3 mm
• Colour: 900 Black
• Toe: internal split
• Sole: thin, segmented rubber
• Construction: double cuff, sealed and glued blind-stitched seams, drainage holes
• Inner lining: Silk_Stuff 2.0
• Material composition: 80% neoprene, 20% polyamide
• Manufacturer article number: 48270-4304

Choosing the right size

ION offers eight size options: 36/5, 37/6, 38-39/7, 40-41/8, 42/9, 43-44/10, 45-46/11 and 47-48/12. The first number is the EU size; the number after the slash refers to US sizing, not UK shoe sizing. Choose a close, comfortable fit with no bunching underfoot, and check ION's footwear size guidance before ordering if you are between sizes.

Frequently asked questions

Are the Feelgood socks fully waterproof?

No. Their cuffs and seams are designed to reduce water entry, but these are wetsuit-style neoprene socks and some water may still enter. Drainage holes help release water that reaches the outer cuff.

Is the split toe visible from the outside?

No. The split is internal, separating the big toe inside the sock rather than using an exposed split-toe shape.

Why choose these over a reinforced wetsuit boot?

Choose Feelgood when flexible board feel is the priority. A more protective boot is a better fit for frequent rocky entries or situations where sole durability and protection matter more than sensitivity.

Further advice

Compare other neoprene socks or explore the wider neoprene footwear range. If you are unsure about the fit or the right level of sole protection, contact The SUP Company before ordering.