Dyneema is an incredibly strong fabric for its' weight. No other fabric matches the strength to weight ratio of dyneema. The major drawback to dyneema tents is cost, which is driven by the underlying fabric cost.
Aside from weight and cost, dyneema performs slightly differently than standard silnylon. Dyneema has no stretch, which can improve performance in high winds, but also can stress staking systems and poles more than silnylon (silnylon stretches which can act as a shock absorber in rough winds).
We use Ct2e.08 dyneema cuben fiber fabric, which is a 0.8 oz per yard fabric. Many other ultralight dyneema tent manufacturers use a 0.4 to 0.5 oz per yard fabric, which does not meet our durability and strength requirements.
Dyneema is easier to repair than silnylon, and tears are very very hard to propagate - this helps a lot in durability of the fabric.
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