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  • Providing superior load support, this BioForm split wing hipbelt is a thermoformed, laminated closed-cell foam with an outer supportive shell
  • The foam technology in BioForm hipbelts allows heat-molding for a custom fit
  • Osprey's certified Custom Molding available in most stores—check your local REI store for a custom hipbelt molding oven
  • ErgoPull hipbelt closure provides extra leverage in cinching, drawing tension along top and bottom, not through the center, relieving hipbone pressure
  • X-large fits hips greater than 36 in.; large fits hips 33-37 in.; medium fits hips 30-34 in.; small fits hips 27-31 in.


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Best Use Hiking
Fits Waist/Hips
Less than 28 inches
27 - 31 inches
30 - 34 inches
33 - 37 inches
Material(s) Heat-moldable foam/nylon
Weight Unavailable
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What is the difference between the IsoForm and BioForm hip belt?. Will both work on an Osprey Aether 70 2016 pack?

Asked by: MarkZ123
The Bioform4 CM Custom Moldable Hipbelt is "beefier" than the Isoform version. Yes, both of these hipbelts work with the 2016 Aether pack. Note that the current "4" versions do not work with older Osprey backpacks.
Answered by: REIservice
Date published: 2016-08-26

Can the hipbelt be heated and molded at home or must this be done in the store using a special heating stove as suggested in the Details above?

Asked by: AmyIlene
From Osprey: The process of heat molding is delicate and should be done by an Osprey CM Certified Dealer only. Please do not attempt to heat mold your Osprey CM hipbelt at home. Heating the belt in anything other than an Osprey CM Oven could damage the foam and voids the warranty.
Answered by: REIservice
Date published: 2016-07-14
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