竹纤维的凉席是从竹子当中提取的吗?

相同表面积和环境下当然是后者.
竹纤维吸水能力是棉的1.5倍,这意味着竹纤维中所含的水分更难蒸发.这与透气性无关,所谓的透气必须在水含量极低的环境中（如普通气压下的室内环境）
竹纤维分为竹原纤维（物理制取）、竹浆纤维及竹炭纤维（化学制取）,性能最好的当然是竹原纤维,当然成本也是最高的.其次是竹炭和竹浆.其中竹浆纤维的质地,吸湿、抗菌、防臭、透气等性能都大打折扣,不少JS也将其打着竹纤维的旗号把价格抬高避重就轻的进行销售（当然实用性还是高于棉质毛巾）
备注：本人正在使用100%竹原纤维与含30%棉的竹原纤维毛巾.

任何颜色,特别是较厚/较深颜色的衣服都有助于保护皮肤减少对紫外线的过敏反应.
任何纤维的衣服都有同样的功能.
布料较为松薄的穿着较凉快舒服.
纤维素纤维比化纤的透气性/吸汗（湿）性优异,因而穿着性也较舒服,但抗皱性比化纤差,混纺织物兼有两者的之长.
纤维不同当然功能有别.

其实优点和缺点是相对而言的.棉纤维和竹纤维比较,有几个明显的对比点：
1、吸水性能.同样大小的两块毛巾,放入水中,竹纤维毛巾要比棉纤维毛巾吸更多的水份；
2、抗菌抑菌性能.棉纤维毛巾基本不具有,而竹纤维毛巾由于纤维本身含有一叫“竹鲲”的物质,有很好的抗菌抑菌功能,棉毛巾捂一会就会发臭,就是因为细菌的大量繁殖造成的,而竹纤维毛巾不论你怎么捂,就是不会发臭,因为其独特的抗菌抑菌功能；
3、柔软舒适、质感好、亲肤性良好.这些都是竹纤维产品的优点.
还有好多,先说到这儿了.其实还是要自己去使用体会,才会明白就竟有什么好.

如果这块布料是机织物,527*328是经纬密且单位是每10cm527根的话,纱支是40TEX
那么100平方厘米就是527+382根
那么接下来的换算出来的克重就是（527+382）*100/1000000*40＝3.636g/100平方厘米
即克重为363.6克/平方米
这个换算十分的不准确 仅做参考
请提供准确的单位
比如纱支的单位
经纬密等

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竹纤维美容毛巾 bamboo fiber costimetic towel
无捻毛巾 zero-twist towel
运动毛巾 sports towel