Mountain Laurel Designs ProVent FKT Bivy

[Ryan Jordan]

This thread is the official product listing for member gear reviews of this product. Add your review as a reply to help build the shared knowledge base. – Mods

BPL Listing ID: 2026-01-28 04:08:13 UTC / 03f0b284bf

[Ryan Jordan]

I picked up one of the new MLD ProVent FKT bivies this winter. (For context/comparison, I have > 200 nights in two older-style MLD eVent Soul bivies over the past 10+ years.)

The reason I purchased this bivy sack was sizing – I wanted something that was large enough to accommodate a CCF pad + 3.5-inch inflatable + a winter sleeping bag. I opted for the XL size. It accommodates this stack well, with no sleeping bag loft compression (at least when using my 10 °F FF Lark.)

I have limited experience with this bivy so far, and will update my review here as I spend more time in it. In winter temps (nights of 0 °F to 20 °F), condensation is what I expect – a bit of frost on the inside. Similar to just about every other bivy I’ve used in these conditions.

In moderate temps (25 °F to 35 °F), I experience more condensation with the ProVent fabric than I did with MLD’s eVent fabric. Paper specs of MVTR of “ProVent” seem optimistic – but the actual field performance didn’t meet my expectations when compared to eVent. Kind of a bummer, but not a deal-breaker, as the breathability is certainly good enough for my needs.

I haven’t used the bivy in warmer temps yet.

Recommended 7/10Field performance 7/10Use again 8/10

My experience: Expert·Product days in field: 5

Disclosures

Obtained independently: I paid for this product or received it as a personal gift from someone not affiliated with the brand.

Backpacking Light affiliation: I work for Backpacking Light in a paid or official capacity (owner/shareholder, employee, contractor, or paid contributor), but I am posting this review as an independent user and its content was not reviewed or directed by others at Backpacking Light.

[Author]

Posts