What is the weight of the moisture barrier per square yard?

• A. 2.5 oz per sq yard
• B. 4.7 oz per sq yard
• C. 6.2 oz per sq yard
• D. 8.1 oz per sq yard

Answer: (B)

Fabric weight per area is a key factor for moisture barrier performance. The moisture barrier needs to resist moisture while staying flexible enough for comfortable movement. A mid-range weight of about 4.7 oz per square yard provides a balance: it’s heavy enough to offer effective moisture resistance and durability, but light enough to keep the garment more breathable and maneuverable.

If the barrier were much lighter, like around 2.5 oz/yd², it could lack sufficient moisture resistance and durability in demanding conditions. If it were much heavier, such as 6.2 or 8.1 oz/yd², it would add bulk and heat buildup, making the gear stiffer and more tiring to wear over time. Thus, 4.7 oz per square yard hits that practical middle ground, making it the best choice.