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Nalgene HDPE 1.5L Waterbottlr vs Therm-a-Rest Z-Seat Sit Pad

Weight and specs compared for 2026 — and which one to choose.

Therm-a-Rest Z-Seat Sit Pad is the lighter option — 95 g lighter than the Nalgene HDPE 1.5L Waterbottlr (63% less weight). If grams matter to you, that is the one to beat.
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Spec Nalgene HDPE 1.5L Waterbottlr Therm-a-Rest Z-Seat Sit Pad
Weight 152 g · 0.152 kg · 0.34 lb 57 g · 0.057 kg · 0.13 lb
Brand Nalgene Therm-a-Rest
Category Miscellaneous Miscellaneous
Therm-a-Rest Z-Seat Sit Pad
57 g

Durable lightweight foam sit pad at 57 grams.

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Nalgene HDPE 1.5L Waterbottlr vs Therm-a-Rest Z-Seat Sit Pad: which should you buy?

If saving weight is your priority, the Therm-a-Rest Z-Seat Sit Pad wins — at 57 g it is 95 g (63%) lighter than the Nalgene HDPE 1.5L Waterbottlr (152 g). That said, the heavier option may justify the extra grams with more capacity, durability or comfort, so weigh the trade-off against how you'll use it.

See where both rank against everything else in this category on the lightest miscellaneous page, or browse the full gear weight database.

More miscellaneous comparisons