Here are some details about different shower gel products from the search results:

1. Le Petit Olivier Shower Gel - Aloe Vera: This shower gel is made using aloe vera to provide optimal cleansing. It is formulated without harmful ingredients.

2. Saint New York Gel Douche / Body Wash: This body wash is dermatologist-tested and formulated with plant-based ingredients. It contains no PEGs, mineral oil, petrolatum, or dyes. It meets US, UK, and the strict EU regulatory ingredient requirements. It has a bright and optimistic yuzu scent, elevated with hints of turmeric, cardamom, pepper, and fig, and balanced by overtones of coconut.

3. Defense Soap Body Wash Shower Gel: This shower gel provides a smooth, rich lather to remove dirt, grime, and sweat and rinses clean. It is made with 100% natural tea tree oil and eucalyptus oil, which provide a spectrum of benefits.

4. Druide Citronella Shampoo/Shower Gel: This is a 2-in-1 shampoo and shower gel for cleansing the body and hair while respecting nature. It provides the body with all the benefits of citronella.

5. Energie Fruit Shower Gel Monoï & Macadamia Oils: This shower gel is made with 98% natural ingredients, without any silicones, parabens, or dyes. It is enriched with organic macadamia oil, which is full of fatty acids. Its formula is designed to cleanse the skin while leaving it moisturized.

In terms of positive aspects, all of these shower gels are formulated without harmful ingredients and are designed to cleanse the skin effectively. Some of them are enriched with natural ingredients that provide additional benefits, such as aloe vera, tea tree oil, eucalyptus oil, citronella, and macadamia oil. The Saint New York Gel Douche / Body Wash has a bright and optimistic yuzu scent that is balanced by overtones of coconut.

In terms of negative aspects, there is no information available in the search results about any negative aspects of these shower gels.

Regarding the ingredients or materials, the Saint New York Gel Douche / Body Wash is formulated with plant-based ingredients and contains no PEGs, mineral oil, petrolatum, or dyes. The Defense Soap Body Wash Shower Gel is made with 100% natural tea tree oil and eucalyptus oil. The Druide Citronella Shampoo/Shower Gel is designed to respect nature and provides the body with all the benefits of citronella. The Energie Fruit Shower Gel Monoï & Macadamia Oils is made with 98% natural ingredients, without any silicones, parabens, or dyes, and is enriched with organic macadamia oil.