How to Choose a Yoga Bolster Fill: Buckwheat vs Spelt
By Sustainable Yoga Mats， Yoga Equipment | Published: 2026-10-17
Category: Buying Guides
Deciding between buckwheat and spelt for your yoga bolster? This guide explains the key differences in firmness, weight, and feel to help you pick the right natural fill.
Quick answer
Choose buckwheat hulls for a firmer, heavier bolster that holds its shape and provides deep pressure. Choose spelt husks for a lighter, slightly softer feel that still offers solid support. Both are natural fills that let you adjust firmness via zippered covers.
What makes natural fills different
Buckwheat hulls and spelt husks are both eco-friendly, plant-based fills that behave differently under your body. Buckwheat hulls are small, hard, and dense, which makes a bolster feel heavy and very firm. Spelt husks are lighter and a bit more pliable, giving a medium-firm feel that still supports well. Because both fills are loose, you can add or remove material through a zippered inner cover to fine-tune the height and density.
Firmness and weight trade-offs
If you want a bolster that barely compresses and provides strong, consistent support—especially for restorative poses like supported child's pose or reclined twists—buckwheat is the better choice. The extra weight also helps the bolster stay put on the mat. On the other hand, spelt husks are noticeably lighter, which makes the bolster easier to move around and adjust during a session. Spelt still offers reliable support but with a bit more give, which some people find more comfortable for longer holds.
How to adjust the fill level
Both our Organic Cotton Yoga Bolsters come with a zipped inner cover and a zipped outer cover. This design lets you open the outer cover, unzip the inner liner, and pour out or add filling as needed. Start with the factory fill level, use the bolster for a few sessions, then adjust until the firmness feels right for your body and the poses you do most. Removing some fill makes the bolster softer and lower; adding fill makes it firmer and taller.
Decision rules for choosing your fill
- Prefer maximum firmness: Choose buckwheat hulls. They are denser and heavier, so the bolster barely sinks under your weight. Great for deep pressure and staying in place. Best for restorative poses and anyone who likes a solid, unmoving prop.
- Prefer lighter weight with good support: Choose spelt husks. They are lighter than buckwheat but still firm enough for most supported poses. Easier to reposition during practice. Best for moving between poses frequently or if you find buckwheat too hard.
- Want to adjust firmness over time: Both fills come in bolsters with zippered inner and outer covers. You can remove or add filling to change the height and density. Buy whichever fill sounds better now; you can always tweak it later.
Product facts
- Organic Cotton Yoga Bolsters - Filled with Buckwheat or Spelt: Our organic cotton bolsters are our BEST SELLING product. Choose between buckwheat hull or organic spelt husk. Zipped inner and outer covers to add or remove filling for optimum comfort. You can try both fills in the same bolster body and adjust the amount yourself, so you are not locked into one firmness level.
- Organic Cotton Rectangular Bolster - Filled with Spelt or Kapok: The Ekotex Yoga Rectangular Bolster is a modern variation on our classic cylindrical bolster pillow. The flat, broad surface provides beautiful support to the spine and back. Choose between natural kapok filling or organic spelt. If you prefer a rectangular shape for spinal alignment or meditation, this option gives you spelt as a lighter alternative to buckwheat, with kapok as another natural choice.
Which fill fits your practice?
Best for
- Buckwheat: Restorative yoga, yin yoga, and anyone who wants a very firm, heavy bolster that stays put.
- Spelt: Vinyasa or gentle yoga, practitioners who want a lighter bolster, and those who prefer medium firmness.
Not for
- Buckwheat: Not ideal if you need a lightweight bolster to carry to class or if you find hard pressure uncomfortable.
- Spelt: Not the best choice if you need maximum weight and zero compression for deep restorative holds.
