I can't imagine not having hiking straps. There are many times that just sitting out with feet under the straps brings the boat right down to where I want her.
https://www.sailrite.com/ has all the stuff you need for hiking straps.
REI has webbing.
I bought some from a decent hardware store.(alas gone)
The straps on my tramp (SLO) are sewn on in front, fed under short cross straps amidships, and tied to eye straps on the aft crossbar.
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'82 Super Cat 15
Hull #315
Virginia
Previously owned: '70 H14, '79 H16, '68 Sailmaster 26, '85 H14T
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