A pair of these Joomra socks weighed 18.8 ounces (534 grams). This weight is based on US men's size 13. Smaller sizes weigh less. I couldn't accurately measure the thickness of the rubber outsole without calipers, but I'd estimate it to be 7-8mm. The sole is flexible and can be rolled up. I usually wear a size 13 and it was like a size up. The word "Whitin" is on the sole, so I believe Joomra and Whitin are sister brands. The upper is made of thick synthetic fabric and feels durable, but this review is based on socks when I received them.