Braids MULTI PACK DEALS! Synthetic Hair Pre-Feathered 3X King Tips Body Wave 28" (5-PACK, 1B)

I am getting my hair braided for to go swimming. will this synthetic hair hold up? if not, i need a bobbi boss wet and wavy human braiding hair

What is the length of this hair?

Is this one pack with 5 bundles ? Or 5 packs with 3 bundles ?

Are the 5 packs enough for medium box braids? The hair in the packs doesn’t look to be very much per pack.