Recommended Water Temps: 45F+Sizing Tip: Order your regular shoe size or 1/2 size down. For example, if you are a size 10.5, order a 10. If you are a size 10, also order a size 10. NOTE: If your feet are exceptionally narrow or low volume, you may want to size down even more. Better than BarefootWe've changed the bootie-game again with our Solite 2.0 technology. The 5mm Custom Pro 2.0 integrates our new 3-Point Strap with the 2.0 Sole for precision fit and instant response. We've also upped the warmth even more with our new metal-grid Thermal Rebound plush lining. Simply put, our Custom Pro 2.0 is the best watersports boot in the world. Full stop. Here's why:3D Molded Natural Rubber SoleLike all of our new 2.0 Series boots, the 5mm Custom Pro 2.0 features a 3D-molded 1mm natural rubber sole, wrapping up the toes and heel for increased durability and protection against rocks, urchins, and reef. The one-piece sole design leaves no exposed gaps between sole pods, insuring extra protection and durability.Custom-Fit 2.0 Thermofoam Sole with Internal Micro-Split Our patented heat-moldable 2.0 Thermofoam sole has also been completely redesigned including a more comfortable Micro-Split internal split toe. The Micro-Split is only 1cm long, providing round-toe warmth with split-toe response. The Thermo Foam Sole is 6mm thick in the toes/heels for extra protection and 5mm elsewhere. 3-Point Strap with Floating D-RingAnother Solite innovation, our 3-Point Strap anchors under both the arch and heel on the inside of the foot, and under the heel on the outside of the foot. When the strap is tightened, the boot snugs up evenly under the arch and through the rear of the boot, providing instant response and slop-fr