“This Thermal Swim Sock is well constructed both inside and out. I purchased this sock thinking that it would be adequate for the 43 - 46 degrees Lake Washington water in the winter as part of my Open Water Swim gear. To my surprise, it did not hold up to that assumption. The water will seep into the sock even if one folds the wetsuit over the top of the sock. I conclude that some of the reviews will depend on where and when this product is being used as well as one's cold tolerant. My plan is to use this sock when Spring comes which will be perfect.”
“I like the fit of these socks. But I'm swimming in 46F water and need more warmth. I put the Blue Seventies on first then slip Synergy socks over them. When the water gets up in the high 50's this spring the Blue Seventies will be just fine.”
“I open water swim year round in the pacific. These socks cap keep my feet warm for the duration of my 2 mile swims. Bottom are durable too. Great product”
“I bought these for ocean swims in 60 F temperatures. These are a little tight putting on but well worth the effort. They were very warm. They have a fuzzy lining and it felt like I was swimming in warm slippers. I highly recommend and I have recommended them to my swimming club.”
“The Blue Seventy socks are well-made and comfortable. The thermal lining helps keep feet warm. The only drawback I noticed was that the outer layer of the sock is permeable to water and allows water to enter the sock. If the sock had an outer smooth-skin impermeable layer as found in the Blue 70 full suits, this would be an outstanding sock. Hey Blue 70, if you would make a sock with a smooth impermeable skin, I would buy a pair immediately. And the same for gloves. Thanks for the opportunity to express my opinion. Robert”
Hi Robert! Glad you're loving the socks and thanks for the feedback, I'll pass it along. Do keep in mind that the socks are neoprene which is waterproof, but the water can enter through the seams. It should be only a small amount, which you actually do want in the sock so that your body heat can warm it, which is how the wetsuit / socks, etc keep you warm. All the best!