I've got a plain old canvas-type of holster w/ a clip that fits very comfortably IWB. Although the .380 sits a little deep (e.g., the grip is not completely 100% free), I can draw reasonably quickly. Putting my thumb on the tang for a split second helps get it right out, and since it's a little deep there's no need for any extra strap or anything.. The inside is a pretty soft material that is supposed to wick any moisture away from the gun. It was a very affordable purchase at the recent Valley Forge gun show and it seems to work well for me.
I'm probably opening up for a bit of grief from the illustrious members here who love UBG, Uncle Mike's, etc., but that's my $.02.
"He is no fool who gives what he cannot keep to gain what he cannot lose."