I guess da musher waves. Doesn't seem like the hellfire tail likes it. I tried a 6'4 HF and I could still paddle it ok. Think I'm gonna get a 6'4 HF for steeper waves and want get a dominator or any other suggestions for mushier and harder to paddle into waves like summer town waves. Wat size u guys recommend and board? Ii figured I betta stop typing in pigeon cuz people may not understand, mahalo, g