These are a viable in OS and TD.

OS fits 10 - 30 LBS

TD fits 20 - 65 LBS.

 Claire Flowers Preflat

Preflat

Layer 1:

95% Bamboo Viscose and 5% Spandex (280 GSM)

Layer 2:

65% Bamboo Viscose, 25% Hemp and 5% Spandex (380 GSM)

Layer 3:

66% Bamboo Viscose, 28% Organic Cotton and 6% Spandex (300 GSM)

Boosters:

Layer 1:

95% Bamboo Viscose and 5% Spandex (280 GSM)

Layer 2:

70% Bamboo Viscose and 30% Organic Cotton (500 GSM)

Layer 3:

66% Bamboo Viscose, 28% Organic Cotton and 6% Spandex (300 GSM)