I guess I am in the minority but I don't care for the neoprene slings. I have a Vellini and a couple of others I can't remember and have tried to like them because they are comfortable when standing. But the darn things bounce around when you walk. They have so much give, or spring, that they are constantly moving up and down. I find this very irritating.

I like the 1 1/2", or better yet, 2" Canvas slings. You can get them from Jeff's Outdoors and Cabelas. Just make sure to order the length you want as they only adjust about 4". They are cotton and nylon so should be fine when wet and, even if they only last a couple of weeks, are the cheapest part of your hunt. I have had one I bought in Belgium well over 20 years and it just gets better looking every time I use it.