To tell you the truth, if that's the reason you want to switch, don't bother. Silk is pretty fragile.

Try Sig Coverall, it's much stronger:

[link=http://www.sigmfg.com/cgi-bin/dpsmart.exe/ThumbsV6.html?L+Sig+skbn8550+_Ddp_5fSearch1_02a46C overSigSilk_01Search_02Index_01SubMenu_02None_01Me nu_02CatProd_01Thumb_02Silk_20_26_20Fabric_20Cover ing_01Manu_02SIG_01]Sig Coverall[/link]