The Sooruz Guru 5mm Round Toe is Sooruz's serious cold-water surf boot — rigid construction holds the foot properly, 5mm thickness for proper UK winter warmth, Storm Dry fleece-lined interior. The classic round-toe design (simpler than split-toe, slightly warmer) makes this the go-to boot for surfers who do most of their cold-water sessions in standard footwear rather than split-toe.

Key features

• 5mm Limestone neoprene
• Storm Dry fleece-lined interior — recycled polyester, the same lining used in Sooruz's flagship Guru wetsuits
• Rigid construction — holds the foot firmly, no movement inside the boot
• GBS seams — fully waterproof
• Non-slip sole with Flex Neo Tape reinforcement
• Non-slip strips on the top of the foot — extra grip when using foot straps (wing-foiling, kitesurfing)
• Scratch (velcro) fastening — adjustable around the ankle for proper fit
• Round-toe design — warmer and simpler than split-toe

Specification

Size chart

Sooruz boots use US shoe sizing — your UK shoe size is ONE size smaller than US (e.g. UK 9 = US 10).

Variants in this listing are labelled in US sizes (matching the boot's marking). To find your size, take your usual UK shoe size and add 1. If you're between sizes, sizing UP usually works better for boots — wetsuit boots should feel snug but not tight, and tight neoprene around the toes restricts circulation and reduces warmth. For sizing advice, call us on 01492 588001.

When to wear which thickness

• 2mm Fly Boots — UK water above 16°C (mid-summer only) or for foot protection on rocky shores where warmth isn't the issue.
• 3mm Flow — UK water 12-18°C (spring/summer/autumn). The Flow is thin and sock-like — for surfers who want maximum board-feel, not maximum warmth.
• 5mm Guru — UK water 6-12°C (autumn/winter/early spring). The standard UK cold-water boot — proper warmth, rigid foot hold, designed for serious cold-water sessions.
• 6mm Guru — UK water below 7°C (deep winter). For the coldest sessions when 5mm isn't quite enough.

About Sooruz

Sooruz is a French watersports brand founded in 1999 in La Rochelle, building wetsuits and accessories designed by riders for riders. Innovation and environmental responsibility sit at the core — Sooruz pioneered Oysterprene® neoprene (made using recycled oyster shells and bio-based components), alongside recycled fabrics, water-based glues, and circular initiatives for used wetsuits.

Sooruz makes three boot families: Flow (thin, sock-like, warmer-water surfing where board-feel matters), Guru (rigid, warm, cold-water serious-session boots in 5mm and 6mm), and Fly Boots (rocky-coast foot protection in 2mm). Each is built around the Storm Dry fleece-lined interior that customers know from Sooruz's wetsuit range.

Honest advice from us

The Guru 5mm Round Toe is the standard UK cold-water surf boot — the kind of boot that does its job and lasts. Currently a single US 5 variant in stock — for other sizes in this exact model, check the older H22 Round Toe variant (Product 3 in this listing range) which has more sizes at a slightly lower price. Round Toe vs Split Toe? Round Toe is warmer (no internal split letting water flow between toes) and easier to put on. Split Toe gives better independent toe movement for surfers who prefer the feel. Both are great. 01492 588001 for sizing.

Pairs well with

Sooruz neoprene gloves for cold-water sessions · A Sooruz changing robe for getting in and out of boots in a car park · A wetsuit shampoo for proper aftercare (rinse boots inside and out with fresh water after every session) · A boot-and-glove dry bag for transport

Free UK postage over £50.