This silicone bar tape from ESI provides excellent grip and cushioning without being overly bulky yet can be voluminous if you desire.

While the grip in dry conditions is good, we found that in deluges the silicone becomes quite 
slippery, particularly when riding with bare hands; not such a problem in spring but worth noting if you get caught in a 
summer downpour when you’re more likely to have ditched the gloves.